* remove need for #Content div in theme
* rename positions classes to prev1/next1
** this make things more regular if preload range is expanded later
* adjust 3D transform test to be a little more theme-agnostic
* make loaded pages available to loaded()
** name is "#"+filename
* pass content div, not wrapper div, as injection value
* fix CSS somewhat accordingly
* wrapper is probably more useful after all
* clicking pages allows page change